Subtract 21/84 from 8/30, Solve 8/30

Subtract 21/84 from 8/30

8/30 - 21/84 is 1/60.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 30 × 14 = 420,
8/30 = 8 × 14/30 × 14 = 112/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420
Subtract the two like fractions:
112/420 - 105/420 = 112 - 105/420 = 7/420
After reducing the fraction, the answer is 1/60

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